SWRCHB737

The actual basis is the original Japanese version of JIS G3508-1:2005; This is not a verification conclusion based on the official original text of the 2010 edition. This record covers SWRCHB feedstock wire rod.; The delivery condition, mechanical properties, and applicable standards of SWCHB wire after processing must be confirmed separately; they shall not be automatically interchanged or used to create new supply commitments. B only specifies a lower limit ≥0.0008%, and the original table has no upper limit; general boron upper limits shall not be entered; Unlisted elements shall not be filled as 0. This grade is listed only in Annex 2 (Reference) and does not belong to the 12 normative grades in Clause 3 of the main text. The appendix notes that hardenability data and actual-use records are missing.; The reference chemical table cannot be regarded as a normative delivery guarantee. The chemical table in the appendix contains only six elements: C/Si/Mn/P/S/B; The Cr/Cu/Ni limits and the B/Si remarks from Table 2 of the main text shall not be directly applied to this reference appendix. No guaranteed hardenability, tensile strength, hardness, decarburization, or default delivery specifications are provided based on this.

Annex JB of the Japanese original version of JIS G 3508-1:2010 is for informational reference; These 12 grades have been separated from Clause 3 of the main text. ; The appendix explicitly lacks hardenability data and records of actual use; JB.1 composition cannot be used as a normative delivery guarantee. ; JB.1 only lists C, Si, Mn, P, S, B; Cu/Ni/Cr limits or B/Si agreement notes from Table 2 of the main text shall not be directly applied. ; This record does not establish suitability for a cold-heading process or a commitment to supply from stock..